I n s t allation & Operating In s truc t ion s
Automatic Light Switch
with Photocell – 2 Wire
Model: ST210
1. General Information
These instructions should be read carefully in full prior to installation,
and retained for further reference and maintenance.
2. Safety
• Before installation or maintenance, ensure the mains supply to
the light switch is switched off and the circuit supply fuses are
removed or the circuit breaker turned off.
• It is recommended that a qualified electrician is consulted
or used for the installation of this light switch and install in
accordance with the current IEE wiring and Building Regulations.
• Check that the total load on the circuit including when this light
switch is fitted does not exceed the rating of the circuit cable,
fuse or circuit breaker.
3. Technical Specifications
• Mains Supply: 230V AC 50 Hz
• 2 wire connection: No neutral required
• This light switch is of class II construction and must not be earthed
• Switch Type: Single or Two way
• Switch Rating: 300W (Max total load) Halogen,
18W (Min lamp size) to 150W (Max total load)
Fluorescent Low-loss or Electronic ballast,
15W (Min lamp size) to 100W (Max total load)
CFL Electronic ballast,
5W (Min lamp size) to 300W (Max total load)
LED lighting
• Minimum Depth of Wall Box: 25mm
• Operating Temperature: -20°C to +40°C
• Mounting Height: 1.1m for optimum detection range
• On-time Adjustment: 0, 2, 4, 6, 8 hours or D (Dusk until Dawn).
• LUX Adjustment: 1 ~10lux (Moon symbol) to 300lux (Sun symbol)
• Manual ON/OFF Switch
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• RED LED: This will light to indicate that an On-Time duration is set.
• CE Compliant
• Dimensions – H=86mm, W= 86mm, D=27mm
4. Installation
4.1 Ensure the mains supply is switched off and the circuit supply
fused are removed or the circuit breaker is turned off, until you
have completed the installation.
2
Manual ON/OFF
Switch
Light (Lux)
Sensor
Red LED
(will light to
indicate that
an On-Time
duration has
been set.)
Fig 1 – Front Face of ST210
Fig 2 – Manual ON/OFF Switch Positions
Switch set to
ON position Switch set to
OFF position
This product requires to be permanently powered which
is achieved through the switched live. As such, some LED
and CFL lamps may glow or flash whilst this product is
in the “OFF” status. This glow/flash can be eliminated
by adding the Timeguard ZV900 Automatic switch load
controller to the circuit.
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4.2 Remove the existing light switch, and transfer the wires to the
ST210 (See Fig 5 – Connection Diagram).
4.3 Secure the unit to the back box with the fixing screws provided,
forming the cables during installation to avoid any entrapment
and cable damage.
5. Connection Diagram
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2 way connection diagram single switch connection diagram
L L2L1 L L2L1 L L2L1 L L2L1
Fig 3 – Installation
Fig 4 – Connection Diagram
ST210 Light Switch
2 Way Switch
External
Load
Fig 5 – Connection Diagram
6. Testing
• Ensure that the light switch is in the OFF position.
• Turn the Lux Adjustment, located on the bottom of the light
switch, fully anti clockwise to the Moon symbol. (See Fig 6)
• Turn the On-time Adjustment, located on the bottom of the
light switch, clockwise to the 2 hour mark. (See Fig 6)
• The RED LED will light to indicate that an On-time duration
is set.
• Emulate darkness by covering the Light Sensor (make sure the
Light Sensor is fully covered, use black insulation/PVC tape if
needs be).
• The lamp will automatically turn ON.
• After 3 seconds, uncover the Light Sensor.
• The lamp will turn off after it’s set period 2, 4, 6 or 8 hours
or until dawn.
• To revert to a normal light switch, turn the On-time
Adjustment fully anti-clockwise to the 0 hour mark
(The RED LED will turn OFF).
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In the event of ST210 not able to power on during installation
due to high impedance of LED lamp, installer is advised to
connect X1 capacitor (without polarity) in parallel with L/N.
Recommended X1 Capacitor value.
• X1 0.22uf / 275V or
• X1 0.33uf / 275V or
• X1 0.39uf / 275V
(2 way connection diagram)
ST210
L L2L1 1L 2LL
X1 CAP.
L L2L1
X1 CAP.
L L2L1
X1 CAP.
(single switch connection diagram)
ST210
2 way connection diagram
single switch connection diagram
7. Setting Up For Automatic Operation
• Ensure the light switch is in the OFF position.
• Turn the Lux Adjustment fully anti-clockwise to the Moon symbol.
• Turn the On-time Adjustment to the desired setting (2, 4, 6, 8
Hours or D for Dawn).
• The RED LED will light to indicate that an On-time duration has
been set.
• When the ambient light level reaches the level of darkness at
which you wish the lamp to become operative (i.e. at dusk)
SLOWLY rotate the control in a clockwise direction until
a point is reached where the lamp illuminates.
• Leave the Lux Adjustment set at this point.
• At this position, the unit should become operative at
approximately the same level of darkness each evening.
Note: If you wish to use unit as a normal light switch, turn the On-
time Adjustment fully anti-clockwise to the 0 hour mark (the RED
LED will turn OFF). If you wish to use the Automatic feature again,
please follow the above instructions.
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Fig 6 – On-time and Lux Adjustment
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Adjustment
• If you find that your lights switch on when it is too dark,
turn the Lux Adjustment clockwise towards the Sun symbol.
• If the light is in operation when it is too light turn the Lux
Adjustment towards the Moon symbol.
Notes:
• The ST210 light switch has a built-in delay function to ensure
that momentary changes in the light do not switch it ON.
• The hours shown on the dial are only approximate guides,
do not expect great accuracy.
• Once the switch has turned ON and the programme has turned
OFF after the required number of hours, it is important not to
allow artificial light to fall on it, followed by a period of darkness.
This will fool the switch into thinking it is dark again and it will
operate. Care should therefore be taken to prevent light falling
onto the switch, e.g. table lamps.
8. Support
Note: If you have any concerns that the intended application of this
product does not meet your requirements, please contact Timeguard
directly prior to installation.
2 Year Guarantee
In the unlikely event of this product becoming faulty due to defective
material or manufacture within 2 years of the date of purchase, please
return it to your supplier in the first year with proof of purchase and it
will be replaced free of charge. For the second year or any difficulty
in the first year telephone the helpline on 020 8450 0515.
Note: A proof of purchase is required in all cases.
For all eligible replacements (where agreed by
Timeguard) the customer is responsible for all
shipping/postage charges outside of the UK.
All shipping costs are to be paid in advance
before a replacement is sent out.
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67.058.651 (Issue 4)
Timeguard Limited.
Victory Park, 400 Edgware Road,
London NW2 6ND
Sales Office: 020 8452 1112
or email csc@timeguard.com
For a product brochure please contact:
HELPLINE
020 8450 0515
or email helpline@timeguard.com
www.timeguard.com
Qualified Customer Support Coordinators will be online
to assist in resolving your query.
If you experience problems, do not immediately
return the unit to the store.
Telephone the Timeguard Customer Helpline:
TW - August 2023
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